December weather forecastFort Atkinson, IA
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Fort Atkinson, Iowa, with temperature in the range of an average low of 18.3°F (-7.6°C) and an average high of 28.4°F (-2°C).Temperature
A moderate decline in the average high-temperature is seen during December, decreasing from an icy 41.9°F (5.5°C) in November to a freezing cold 28.4°F (-2°C). Throughout the month of December, Fort Atkinson reports a steady low-temperature average of 18.3°F (-7.6°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In Fort Atkinson, during December, the rain falls for 6.4 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Fort Atkinson, during the entire year, the rain falls for 149 days and collects up to 30.59" (777mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Fort Atkinson, during December, snow falls for 13.1 days and regularly aggregates up to 4.57" (116mm) of snow. Throughout the year, there are 60.9 snowfall days, and 24.37" (619mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:20 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:42 pm CST.
Sunshine
In Fort Atkinson, Iowa, the average sunshine in December is 3.9h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fort Atkinson, IA
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in December
Fort Atkinson, IA
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Fort Atkinson, IA
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Fort Atkinson, IA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Fort Atkinson, IA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Fort Atkinson, IA
- Average rainfall days in December: 6.4 days
The months with the highest number of rainy days are May and June (20.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
Fort Atkinson, IA
- Average snowfall in December: 4.57"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fort Atkinson, IA
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fort Atkinson, IA
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Fort Atkinson, IA
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.1 days).
Average UV index in December
Fort Atkinson, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Fort Atkinson, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Fort Atkinson, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
